Spindle.



No. 690,024. Patented nec. 3|, 190|.

.1. F, KELLER.

SPINDLE.

(Application mea Apr. 22,1901.)

(Ilo Model.)

W/T/VESSES:

34N/@www4 Arm/mfr' l Nrrln Sfrnries` PATENT OFFICE.

JOSEPH FINK KELLER, OF NEW YORK, N. Y., ASSIGNOR TO SYDNEY A. KELLER, OF NEW YORK, N. Y.

SPlNDLE.

SPECIFICATION forming part of Letters Patent No. 690,024, dated December 31, 1901.

Application iled April 22, 1901. Serial No. 56,833. lNo model.)

To a/ZZ whom t rrr/ty concern;

Beit known that I, JOSEPH FINK KELLER, a citizen of the United States, and a resident of New York, borough of Manhattan, in the county of New York and State of New York, have made and invented certain new and useful Improvements in Spindles, of which the following is a specification.

My invention relates to an improved spindle, and more particularly to a device of this character designed for carrying rotating cutting-tools for use upon mechanical die-cutting and engraving machines, the object of the same being to So construct and arrange the several parts that the spindle carrying the cutting-tool shall be relieved of the pulling strain of the driving-belt, and thereby permit of a very rapid rotation of the spindle and cutting-tool with the least possible twisting strain.

A further object of the invention is to so construct and arrange a device of this character that the cutting-tool may be removed therefrom or inserted therein without the necessity of detaching the spindle, with its casing, from the rod carrying the same, and, further, to so construct and arrange the device that the cutting-tool may be readily removed when desired to grind or sharpen the same and which will properly and with exactness center itself when inserted or replaced within the carrying-spindle.

Vith these and other ends in view my invention consists in certain novel features of construction and combinations of parts, as will be hereinafter more fully described, and pointed ont in the claims.

In the accompanying drawings, Figure 1 is a sectional View of my improved device with the parts shown in their normal positions. Fig. 2 is a sectional view taken on the line 2 2 of Fig. 1. Fig. 3 is a detached viewin elevation of the spindle for carrying the cuttingtool. Fig. 4: is a detached view in elevation of the sleeve surrounding the spindle, and Fig. 5 a similar view of the bearing-box for the outer end of the spindle. Fig. G is a view in elevation of the spindle casing or box.

While :my improved device is applicable for use in connection with any and all machines wherein a rapidly-rotating spindle is used,

and especially where the latter carries a cutting-tool, I have designed the same more particularly for use in connection with machines for engraving or sinking dies and matrices and other objects in relief or intaglio wherein the movements of the cutting or engraving tool are controlled by the movements of a pointer or tracer retained in contact with the surface of a model, pattern, or templet, the devices carrying the cutting-tool and tracer or pointer being mounted upon a shaft capable ot' movement in all directions, such a machine being shown and described in Letters Patent No. 500,317, granted June 27, 1893, toL. F. Campi,

Ywhich machine being in daily use and well known to and understood by those skilled in the art to which the same relates needs no description or illustration here. In the present instance I have not shown the rod or bar which carries the device, but have illustrated the parts necessary for attaching the same to said bar, these parts consisting of the clampsections 2 3, hollowed out, as shown at 4, to lit around the bar and secured together by means of the bolts 5 5. The upper section 2 of the clamp is provided with a dovetailed groove 6, in which is fitted the spindle box or casing horizontally adjusted by the screw 7, the latter passing through the plate 8, held in place'by the thu rnb-screw 9. As the abovementioned parts simply act as a support for my improved device and form no part of the invention, they need no further description.

The spindle box or casing consists of the parts 10 11, which are secured together by the yoke or arm 4l, the lower port-ion of the part 10 being dovetailed in order to iit into a similar-shaped groove G, as before described, the upper portion having secured thereto an oil-cup 12, communicating by means of passages with the chamber 13 into the opening in the forward portion thereof, through which passes the spindle 15, the latter passing entirely through the box or easing, as hereinafter described. The forward end of this spindle is enlarged, as shown at 16, and provided with converging sides 17, which when the parts are in their normal positions, as shown in Fig. 1, bear against the flaring sides of the opening in said portion 10 of the box or casing. The spindle is then tapered, as at 30, to the shoulder 18, from which part it is somewhat reduced in diameter, as shown at 19, Fig. 3, until near the rear end it is again enlarged, as illustrated at 20, and from there threaded to its extreme rear end, as at 21, the enlarged portion 2O acting as a bearing or support for the spindle in the stationary sleeve 22, which sleeve is inserted into the journal or casing 11 and held from movement therein by means lof a pin or lug 23, formed on or secured to the iiange 24 and extending into an opening formed in said box or casing 11 to receive it. In order to relieve the spindle from the pulling strain of the belt employed for rotating it, l employ the' rotating sleeve 25, fitting around the reduced portion 19 of the spindle and extending, preferably, from the shoulder 18 to the enlarged portion 20, the forward end of said rotating sleeve 25 being slotted, as illustrated at 26, to receive and contain the ends of the pin 27, extending through the reduced portion 19 of the spindle, near the shoulder 18 thereof, the rotating sleeve being removably held in its proper position by means of the stationary sleeve 22, fitting around the portion 2O of the spindle, the diameter of said sleeve 22 being substantially the same as that of the sleeve 25. n

On the outer threaded end 21 of the spindle is a nut 28v and a lock-nut 29, whereby the spindle maybe adjusted in the direction of its length within the casing, and any loss of motion occasioned by the wear on the spindle or the frictional surfaces of the casing taken up. It will be noticed that the lock-nut is made in the form of a small wheel and may be of sufcient Weight to act as a iiy-wheel for the spindle onto which it is threaded.

To the rotating sleeve 25 and between the portions 10 and 11 of the casing is secured the pulley 31 and held from movement thereon by means of the set-screw 32, around which pulley is intended to pass the belt (not shown) for imparting motion to the spindle.

From the foregoing description it will be understood that by this construction and arrangement of the several parts the sleeve 25 when rotated by the pulley 31 will impart its motion to the spindle 15 by reason of being pinned thereto, as before described, the strain or pull of the belt, however, being directed against the sleeve and not against the spindle, as has heretofore been the case. I have found in practice that by thus relieving the spindle of this pull or strain of the belt and by reducing the frictional surfaces of the spindle and its casing, as before described and illustrated in the drawings, it is capable of more effectively doing its work and at a very high ratev of speed.

The portion 11 of the spindle-easing has secured thereto the oil-cup 42, communicating with passages formedV in the said section 11, leading to the sleeve 25, Wherel the same comes into frictional contact with said section, and also through the stationary sleeve 22 to the enlarged portion 20 of the spindle, as illustrated in Fig. 1. y

The enlarged portion 16 of the spindle is hollowed out to receive the bushing 33, held in its proper position by the set-screw 34, said bushinghavinga central openingthrough the same to receive and contain the cuttingtool 35, the latter in turn being held in position within said bushing by means of tne setscrew 36, the forward or cutting end of said tool being sharpened, as illustrated at 37. By reference to Fig. l of the drawings it will be seen that the bushing 33 is made tapering to be contained within a correspondinglyshaped openingin the spindle, this construction thus rendering it certain that said bushing will properly center itself or assume its proper position within the spindle. When desired to sharpen the tool 35, the bushing containing said tool is removed from the spindlebysimplyloosening thescrew 34. The tool 35 is then properly adjusted in its length within said bushing and sharpened while contained within the same, so that in again assembling the parts the cutting-tool will be properly centered with relation to the spindle and to the material 39 which is being eut or engraved, it being highly essential that while the die is being cut or engraved the tracer or pointer and the cutting-tool shall always be maintained in the same relative positions to each other and the same positions with relation to the pattern and die, respectively. By sharpening the cutting-tool 35 while contained within the bushing 33 it will be understood that the cutting-point can be easily and readily maintained in axial alinement therewith, and by forming the bushings 33 of the shape shownthat is, tapering toward its rear end in the form of a truncated conethe bushing, with its centered cuttingtool, will always properly center itself with relation to the spindle.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a device of the character described, the combination with a casing, of a spindle having an enlarged and tapering end bearing IOC within said casing, a sleeve surrounding the central portion of said spindle and removably connected therewith, said sleeve bearing in said casing, a pulley secured to said sleeve for imparting motion to the latter and to the spindle, a stationary sleeve ittin g within said casing and around said spindle for holding said rotating spindle in its proper position, and means for adjusting said spindle in the direction ofits length within said casing, substantially as described.

2. In a device of the character described, the combination with a casing, consisting of the sections 10 11, connected by means of an arm or yoke, of a spindle, having one end enlarged and bearing and rotating Within said section 10 of the casing, a sleeve 25 fitting around said spindle and removably connected therewith, the ends ot said sleeve bearing in said sections l and 1l of the casing, and a pulley 3l secured to said sleeve between said sections l0 and ll of the casing for imparting a rotary motion to said sleeve and to said spindle, substantially as described.

3. In a device of the character described, the combination with a suitable casing, of a spindle rotating within said easing and having one end enlarged and tapered for the purpose described, the central portion of said spindle being reduced in diameter, a sleeve tting around said central portion of said spindle and connected thereto and rotating therewith, and a stationary sleeve fitting around the end of said spindle to forni a bearing therefor and to hold said rotating sleeve in its proper position in said casing, substantially as described.

4. In a device of the character described, the combination with a casing, consisting ot' the sections 11 and yoke 41, of a spindle having one end enlarged and bearing Within said section 10, the central portion of said spindle being reduced in diameter, the sleeve fitting around the central reduced portion ot' said spindle and connected therewith, the stationary sleeve 2O tting within said section ll and around the end of said spindle, the pulley 3l secured to said sleeve between said sections 10 and 11 for imparting motion to said sleeve and through the latter to said spindle, and a bushing removably held within the enlarged end of said spindle, substantially as described.

Signed at New York, in the county of New York and State of New York, this 19th day of April, A. D. 1901.

JOSEPH FINK KELLER.

Witnesses:

GEORGE CooK, M. VAN NoRTwIoK. 

